X509_cmp_time

API 概述

X509_cmp_time 是 openssl 中的一个API。该规属于return value check 类型。该规则是使用 AURC 生成的。

规则描述

提示

X509_cmp_time() and X509_cmp_current_time() return -1 if B<asn1_time> is earlier than, or equal to, B<in_tm> (resp. current time), and 1 otherwise. These methods return 0 on error.

信息

标签：return value check

参数下标：N/A

CWE类别：CWE-253

规则代码

import cpp

class OpenSSLFunctionCall extends FunctionCall {
  OpenSSLFunctionCall() {
    this.getTarget().hasName("X509_cmp_time")
  }
}

from OpenSSLFunctionCall call, UnaryOperation uop
where
  uop.getOperator() = "!" and
  uop.getOperand() = call.getAnAccess()
select uop, "This negation checks the return value of X509_cmp_time."